This is an odd statistic, because it doesn’t look at individuals, or even at households, but at families. I did some work to make this more useful. According to the Statistical Abstract of the US, there are about 2.7 people per household. For the moment let’s assume one household per family (it’s somewhat higher than that) and assume one person in each family holds the web site and the domain (it’s probably a little higher than that).

I estimate that 9% of people with Internet access have a web site. Keep in mind that the study’s margin of error was 4% and that is compounded by my assumptions. Five years ago, at IDC, we determined that about 10% of Internet users had Web sites.

The share of Internet users with Web sites has not changed significantly in the last five years. [Thanks, eMarketer!]